I believe this product may either be for those who never workout, or perhaps elderly or weaker people (no offense!), because even at the third, greatest tension, it's way too easy. I would have to do TONS of reps to benefit noticeably. One problem I have encountered is that having to hold onto the handles, with my arms bent so drastically, for an extended period of time, and WITH tension being placed on my elbows' tendons REALLY makes my elbows sore, and I worry a bit if this will not cause long-term damage/discomfort. One suggestion, too, would be for them to place a rubber patch on the part that rests on the legs, because unless one has it a just the right position, the contraption tends to slip.